 The last three stones are in the style Pr2 and thus dated to the period 1020–1050, but the internal relationship between them shows that U 137 is the oldest one.They belong to a group of c. 20 runestones called the Jarlabanke Runestones that are connected to the local strongman Jarlabanke and his clan.Together with the Hargs bro runic inscriptions and the Uppland Rune Inscriptions 101, 143 and 147 these particular runestones, however, centre on the matriarch of the clan called Estrid.